Which nut shape is used with machine screws besides squares?

Which nut shape is used with machine screws besides squares?

• A. Octagonal
• B. Round
• C. Hexagonal
• D. Oblong

Answer: (C)

Hexagonal is the standard nut shape paired with machine screws besides squares because its six flat sides give multiple wrench surfaces, making it easy to grip and apply torque in tight spaces with a wrench or socket. This shape also distributes load well and is universally standardized across sizes, which is why it’s the typical choice for machine screws. Other shapes like round, octagonal, or oblong are used far less often or in specialized cases, so they aren’t the common option for machine-screw fastenings.

Hexagonal is the standard nut shape paired with machine screws besides squares because its six flat sides give multiple wrench surfaces, making it easy to grip and apply torque in tight spaces with a wrench or socket. This shape also distributes load well and is universally standardized across sizes, which is why it’s the typical choice for machine screws. Other shapes like round, octagonal, or oblong are used far less often or in specialized cases, so they aren’t the common option for machine-screw fastenings.